A gray dot when zoomed in on by an iTouch to be found to be saucer like.

I was geting off the computer to go outside and play basketball. I open the front door and hear a 'whoosh' type of sound. I see a gray dot, certainly not a human made aircraft, and decide to take photos. When I take the photo, the UFO going across the sky at least 5x the speed of a jet, I zoom in on it. When I examine it, it looked like a saucer. My first UFO spotting.